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Finding the Fourth Proportional to 218,879.80, 328,319.70 and 217,497.40

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Solution

The fourth proportional to 218,879.80, 328,319.70 and 217,497.40 is: 326,246.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,879.80 : 328,319.70 = 217,497.40 : x
  2. Step 2: Convert to fraction form
    218,879.80/328,319.70 = 217,497.40/x
  3. Step 3: Cross multiply
    218,879.80x = 328,319.70 × 217,497.40
  4. Step 4: Simplify right side
    218,879.80x = 71,408,681,118.78
  5. Step 5: Solve for x
    x = 71,408,681,118.78/218,879.80
  6. Step 6: Final answer
    x = 326,246.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.